Parietal operculum
Operculum parietale
Definition
The parietal operculum is part of a larger cortical operculum called the fronto-parietal operculum. The fronto-parietal operculum is the cortical region situated behind the anterior ascending ramus of the lateral sulcus, and above its posterior ramus. It contributes to the upper lip of the lateral sulcus, which extends over the insular cortex.
Within the fronto-parietal operculum, the frontal section is made up of the inferior frontal gyrus and includes the lower part of the precentral gyrus. This area is responsible for controlling the muscles in the face, head, and neck. It also forms a portion of the Broca’s motor speech area towards the front. Meanwhile, the parietal operculum section of the fronto-parietal operculum contains the primary sensory area of the postcentral gyrus.
Other important cortical opercula that cover the insular cortex include the orbital, frontal, and temporal opercula.
References
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Text written by Muhammad A. Javaid, MD, PhD © 2023 IMAIOS.
Dziedzic TA, Bala A, Marchel A. Anatomical aspects of the insula, opercula and peri-insular white matter for a transcortical approach to insular glioma resection. Neurosurg Rev. 2022 Feb;45(1):793-806.
Kortz MW, Lillehei KO. Insular Cortex. [Updated 2023 May 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK570606/
